Diode laser absorption sensors for gas-dynamic and combustion flows

MG Allen - Measurement Science and technology, 1998 - iopscience.iop.org
Recent advances in room-temperature, near-IR and visible diode laser sources for tele-
communication, high-speed computer networks, and optical data storage applications are …

Fitting of calibration-free scanned-wavelength-modulation spectroscopy spectra for determination of gas properties and absorption lineshapes

CS Goldenstein, CL Strand, IA Schultz, K Sun… - Applied …, 2014 - opg.optica.org
The development and initial demonstration of a scanned-wavelength, first-harmonic-
normalized, wavelength-modulation spectroscopy with nf detection (scanned-WMS-nf/1f) …

Extension of wavelength-modulation spectroscopy to large modulation depth for diode laser absorption measurements in high-pressure gases

H Li, GB Rieker, X Liu, JB Jeffries, RK Hanson - Applied optics, 2006 - opg.optica.org
Tunable diode laser absorption measurements at high pressures by use of wavelength-
modulation spectroscopy (WMS) require large modulation depths for optimum detection of …

Wavelength modulation spectroscopy: combined frequency and intensity laser modulation

S Schilt, L Thevenaz, P Robert - Applied optics, 2003 - opg.optica.org
A theoretical model of wavelength modulation spectroscopy that uses a laser diode on a
Lorentzian absorption line is presented. This theory describes the general case of a current …

Analysis of calibration-free wavelength-scanned wavelength modulation spectroscopy for practical gas sensing using tunable diode lasers

K Sun, X Chao, R Sur, CS Goldenstein… - Measurement …, 2013 - iopscience.iop.org
A novel strategy has been developed for analysis of wavelength-scanned, wavelength
modulation spectroscopy (WMS) with tunable diode lasers (TDLs). The method simulates …

Absorption measurements of water-vapor concentration, temperature, and line-shape parameters using a tunable InGaAsP diode laser

MP Arroyo, RK Hanson - Applied optics, 1993 - opg.optica.org
A tunable diode laser diagnostic based on spectrally resolved laser absorption has been
developed to detect water vapor. The system uses a distributed feedback InGaAsP diode …

CO concentration and temperature sensor for combustion gases using quantum-cascade laser absorption near 4.7 μm

W Ren, A Farooq, DF Davidson, RK Hanson - Applied Physics B, 2012 - Springer
A sensor for sensitive in situ measurements of carbon monoxide and temperature in
combustion gases has been developed using absorption transitions in the (v′= 1← v ″= 0) …

Tunable diode laser monitoring of atmospheric trace gas constituents

M Feher, PA Martin - Spectrochimica Acta Part A: Molecular and …, 1995 - Elsevier
Review Tunable diode laser monitoring of atmospheric trace gas constituents Page 1
ELSEVIER Spectrochimica Acta Part A 51 (1995) 1579-1599 SPECTROCHIMICA ACTA PART …

Tunable diode-laser spectroscopy with wavelength modulation: a calibration-free approach to the recovery of absolute gas absorption line shapes

K Duffin, AJ McGettrick, W Johnstone… - Journal of Lightwave …, 2007 - opg.optica.org
The principles and implementation of an alternative approach to tunable diode-laser
spectroscopy with wavelength modulation are described. This new technique uses the …

High-bandwidth scanned-wavelength-modulation spectroscopy sensors for temperature and H2O in a rotating detonation engine

CS Goldenstein, CA Almodóvar… - Measurement …, 2014 - iopscience.iop.org
The design and use of two-color tunable diode laser (TDL) absorption sensors for
measurements of temperature and H 2 O in a rotating detonation engine (RDE) are …